I've recently enounctered a strange problem in M&M7 that did not occur the first game I played, but started the last one, and now has happened twice in the current one. After going through a big fight, healing up & training to the next level (often more than one at a time), I suddenly discover all armor and shield skills (but not Dodging) have disappeared, so I have to re-obtain them & start from scratch, using valuable skill points. I think it only happened once in the last game (start to finish), but has already happened twice in the current game. Any ideas why?